Witniesses



(No Model.) 2 Sheets-Sheet -l.

O. SMA'LLEY, Jr. APPARATUS FOR TESTING AND STRAIGHTENING DRILLS.

No. 427,805. Patented May 13,1890.

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' (No Model.) 2 Sheets-Sheet 2.

O. SMALLEY, Jr. APPARATUS FOR TESTING AND STRAIGHTENING DRILLS,

No. 427,805. Patented May 13,1890.

A A F'E WITNEEEEE- X7 "NVENT UR,

UNITED STATES P TENT Denice.

ORRICK SMALLEY, JR, OF NEW BEDFCRD, MASSACHUSETTS, ASSIGNOR TO THE MORSETWIST DRILL AND MACHINE COMPANY, OF SAME PLACE.

APPARATUS'FOR TESTING AND STRAIGHTENING DRILLS.

SPECIFICATION forming part of Letters Patent No. 427,805, dated May 13,1890.

Application filed January 27, 1890. Serial No. 338,233. (No model.)

To all whom it nuty concern.-

Be it know-pf that I, ORRICK SMALLEY, J11, of New Bedford, in the countyof Bristol and State of Massachusetts, a citizen of the United States,have invented certain new and useful Improvements in Machines forTesting and Straightening Drill Blanks and Drills, of which thefollowing is a specification.

My invention relates to machines whereby to wire blanks for drills anddrills themselves may be tested to determine their straightncss, and iffound to be curved or crooked may be readily straightened.

In the accompanying drawings I have represented an apparatus embodyingmy present invention.

In the drawings, Figure l is a view of the said apparatus in elevationand partial vertical section. Fig. 2 is aplan view of the same; Fig.

3, an enlarged perspective view of the spring supported block; Fig. 4, aview of the operative end of the straightening device; and Fig. 5, aview of a portion of the'bed or table of the machine, showing thestraighteningslot therein.

According to my improvement the necessity for straightening blanks ordrills is determined by the operator rolling them upon a level bed-plateabout on a level with a suit- 0 able opposed source of light, whereby ifthe blank or drill is not straight this fact will be shown by lightpassing between it and the bed upon which it is rolled. In the drawings.

I have represented the frame of a machine carrying such a bed-plate A asI have described. In this bed-plate I provide a slot oraperture 13,which may conveniently be made of different widths at different portionsand preferably V-shaped. To fill this slot or ap- 0 erture,I provide ablock C, the upper face of which is made to correspond in contour withthe slot B, so as to evenly and closely fill the same. This block isprovided with a yielding support, which may conveniently be in 5 theform of a flat spring, as shown, so that it will ordinarily fill theslot, but will move out of the way in the bending operation.

Above the aperture B, I provide a bending or straightening piece D,provided at its lower or operative end with a properly-formed foot.

This foot I prefer to make of an outline conforming,substantially, tothe form of the slot in the bed-plate, and so have represented it in thedrawings at (Z.

In connection. with this bending-piece I provide a spring E, whichnormally holds it up, and a cam or other convenient means of applyingpower to press it down when desired.

Inasmuch as my improvement concerns both testing for straightness andalso bending, when such test reveals a lack of straightness it isimportant that for the first purpose the bed plate which forms mytesttable should have a continuous surface, to which the surface of thedrill to be tested may be compared against the opposed source of light.

It is for this reason that I employ the springsupported block to fillthe aperture in the bed-plate. hen this block is up in place, thesurface of the bed-plate, being continuous, may be used for testing, asdescribed. If new the machine is to be used as a bendin g-machine, thisis made possible by the combined operation of the aperture in the plate7 5 and the downward yield of the block filling that aperture. The drillin order to be straightened must often be bent slightly into theaperture, which obviously could not be done unless the block had ayielding support. Again, were the aperture left unfilled the bed-plateat that part could be less conveniently used for testing, as the drillwould have to be moved to some other part of the plate for this purpose.

The method of using the device is as follows: The operator being seatedat the side of the bed-plate and with his eye on a level with the lightwhich strikes across it, takes the piece of wire or the drill to betestedand c rolls it over the bed-plate. If the wire blank is straight,so that no light passes under it at any part, it is ready to be formedinto a drill; but if it is bent this fact is shown by the passage oflight under the bent portion as the blank is rolled upon the bed-plate.The same process applies to a drill to be straightened. To straighten ortake out a bend, the operator then lays the wire or the drill with thebent portion over'the slot in the bed-piece, ICO

and, pressing down the straightening-rod D, bends and straightens thewire or drill, the spring-supported block C yielding slightly under thepressure of the straightening-rod to enable the wire to be therebystraightened. \Vhen the slot in the bed-piece is made of varying width,the wire or drill to be straightened will be held across the wider ornarrower part of the slot, according as the bend in it is long or short.

I find it in practice desirable to slightly heat the drill beforestraightening, and for this purpose have represented an aperture in thebed of the machine, as shown at G, through which a gas-flame or othersource of heat may pass to heat the drill.

I claim- 1. In an apparatus adapted both for testing and straighteningdrill-blanks and drills, the combination of a bed-plate provided with abending slot or aperture with a bending-piece located above the saidslot, whereby the straightness of the drill may be first tested byrolling it upon the bed-plate, and its bends, it any, may besubsequently removed by bending it over the said slot by means of thesaid bending-piece.

2. In an apparatus adapted both for testing and straighteningdrill-blanks and-drills, the combination of a bed-plate ,a slot oraperture formed therein, a block normally filling the said slot, ayielding support for the said block, and a bending-piece located abovethe same and adapted to be pressed down upon a drillblank or drill tobend and straighten it, substantially as set forth.

In an apparatus adapted both for testing and straightening drill-blanksand drills, the combination of a bed-plate or true surface,

over which the drill may be rolled and its it, substantially as setforth.

4. In a machine for testing and straightening drill-blanks and drills,the combination of a bed-piece provided with a V-shaped slot, aspring-supported block having a V-shaped portion adapted to enter andfill the slot, a spring supported straightening piece arranged above thesaid slot and having its lower end formed to correspond substantiallywith the form of the slot, and means, substantially as described, forpressing down the said rod toward the said slot to straighten thedrill-blank or drill, all substantially as set forth.

In testimony whereof I have hereunto subscribed my name this th day ofJanuary,

ORRICK SMALLEY, JR. Witnesses:

LEM LE B. IIOLMEs, ELIOT I). STETsoN.

